Perrin WRX STi FMIC Black Blow-Thru Boost Tube (Perrin FMIC required)

The Blow-Thru Boost Tube is intended for use on Subarus which are using aftermarket turbo chargers that can "outflow" the stock intake system. It replaces a PERRIN front mount intercooler boost tube with one that is larger and accepts the factory MAF sensor, relocating it from the intake system to the the boost tube, allowing the ECU to read more air flow, in turn allowing the tuner to tune beyond 550WHP!